[Shop-talk] Annealing Copper bars

[Pat Horne]

Learned something new today! Thanks for the feedback. I didn’t realize that copper doesn’t behave the same as steel!

Peace,
Pat

Pat Horne 
We support Habitat for Humanity


On Aug 8, 2020, at 10:03 AM, John Innis <jdinnis at gmail.com> wrote:


This matches my understanding as well.  Brass and copper soften when quenched.  Steel and Aluminum harden when quenched.

> On Sat, Aug 8, 2020 at 9:59 AM Bob Spidell <bspidell at comcast.net> wrote:
> Could be (the plot thickens):
> 
> "Annealing copper makes it softer and less brittle, which allows you to 
> bend it without breaking it. This malleability allows you to hammer and 
> mold the copper into any shape you wish without cracking the metal. You 
> can anneal any grade and thickness of copper as long as you have a flame 
> that can transmit enough heat to the metal. The most straightforward way 
> to anneal copper is by heating it with an oxygen acetylene torch and 
> rapidly cooling it in water."
> 
> https://www.wikihow.com/Anneal-Copper
> 
> 
> 
> On 8/8/2020 7:43 AM, Pat Horne wrote:
> > Maybe you’re right & I’m wrong! Wouldn’t be the first time.
> >
> > Peace,
> > Pat
> >
> > Pat Horne
> > We support Habitat for Humanity
> >
> >
> > On Aug 8, 2020, at 9:33 AM, Bob Spidell <bspidell at comcast.net> wrote:
> >
> > Well snap. I've been doing it wrong all these years I've reused copper, mostly on sealing washers for oil pan plugs.
> >
> > Thanks for the reply.
> > Bob
> >
> >
> >> On 8/8/2020 7:21 AM, Pat Horne wrote:
> >> I thought quenching made the metal less soft.
> >>
> >> Annealing requires slow cooling.
> >>
> >> Peace,
> >> Pat
> >>
> >> Pat Horne
> >> We support Habitat for Humanity
> >>
> >>
> >> On Aug 8, 2020, at 9:18 AM, Bob Spidell <bspidell at comcast.net> wrote:
> >>
> >>  Question for the List: Is it proper to quench--in water, presumably, or oil maybe--copper to achieve softness after it's been heated 'cherry red?'
> >>
> >> Bob
> >>
> 
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